@oxidizeddreams sorry, I don't have any experience with email data, but general machine learning I'm okay at. What's your question/problem? Maybe we help if you give us an idea of what you're trying to do.
@boratonAJ are these precipitation maps encoded as map data? I'm not familiar with this kind of data. Is it a 3D image? If it is just a single precipitation forecast (like it is going to rain today with so-and-so percentage), I don't think an LSTM would be appropriate.